Physics Seminar
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  • Physics Seminar

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Graphene based smart surfaces

Coskun Kocabas

Bilkent University, Department of Physics,06800, Ankara Turkey


In nature, ability to change skin color is a survival mechanism used for camouflage and signaling. In  reptiles, for example, various mechanisms have evolved to tune the scattering and absorption of light.  Similarly, in modern technology, active camouflage is an emerging field of research aiming to develop  surfaces with reconfigurable optical properties. These “smart” surfaces are essential part of active camouflage systems such as; active radar shield to camouflage objects from radar signals or flexible display devices used for optical cloaking. In this talk, I will present our research on graphene based smart surfaces with reconfigurable optical properties. Instead of tuning the bulk material properties, our approach relies on controlling electromagnetic waves by tuning the density of free carriers on graphene via electrostatic doping. I will present some applications of the developed graphene based smart surfaces covering a broad spectrum from the visible to microwave.

Coskun Kocabas received the BS degree in physics from METU, Ankara, Turkey, in 2001. He took his PhD from University of Illinois at Urbana-Champaign, IL, USA, in 2007. After taking his PhD, he worked as a postdoc in Department of Chemistry and Chemical Biology at Harvard University from 2007 to 2009.  In 2009, he joined Bilkent University Department of Physics as faculty member. His research group is working on synthesis of new quantum materials and their integration in to electronic and photonic devices. He is particularly interested in graphene for tunable light-matter interaction in broad spectrum from visible to microwave frequencies.